The businessman is always encouraging his employees to ______ water-based sports, hoping to develop an amateur racing team in his own company.
| A．build up | B．set up | C．keep up | D．take up |
What was unexpected was that the disrespectable fellow ______ the old man.
| A．could have robbed | B．should have helped | C．should rob | D．might have helped |
I wonder whether the police ______ that lost child or not
| A．have found | B．has been found | C．have been found | D．has found |
Jerry, why ______ you leave your things on the floor like this?
| A．would | B．need | C．must | D．may |
. When Jack reached the station the train ______ for ten minutes.
| A．had gone | B．had set off | C．had been away | D．had left |
After ______ seemed a long time, Mr. Li stood up and broke the silence.
| A．what | B．that | C．it | D．which |